fix(sync): get last max snapshot index

include/libs/sync/sync.h

@@ -192,6 +192,7 @@ bool        syncEnvIsStart();
 const char* syncStr(ESyncState state);
 bool        syncIsRestoreFinish(int64_t rid);
 int32_t     syncGetSnapshotMeta(int64_t rid, struct SSnapshotMeta* sMeta);
+int32_t     syncGetSnapshotMetaByIndex(int64_t rid, SyncIndex snapshotIndex, struct SSnapshotMeta* sMeta);
 
 int32_t syncReconfig(int64_t rid, const SSyncCfg* pNewCfg);
 

source/dnode/mnode/impl/src/mndSync.c

@@ -69,7 +69,8 @@ void mndSyncCommitMsg(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbM
 
     if (cbMeta.index - sdbGetApplyIndex(pMnode->pSdb) > 100) {
       SSnapshotMeta sMeta = {0};
-      if (syncGetSnapshotMeta(pMnode->syncMgmt.sync, &sMeta) == 0) {
+      // if (syncGetSnapshotMeta(pMnode->syncMgmt.sync, &sMeta) == 0) {
+      if (syncGetSnapshotMetaByIndex(pMnode->syncMgmt.sync, cbMeta.index, &sMeta) == 0) {
         sdbSetCurConfig(pMnode->pSdb, sMeta.lastConfigIndex);
       }
       sdbWriteFile(pMnode->pSdb);
@@ -89,7 +90,10 @@ void mndRestoreFinish(struct SSyncFSM *pFsm) {
   SMnode *pMnode = pFsm->data;
 
   SSnapshotMeta sMeta = {0};
-  if (syncGetSnapshotMeta(pMnode->syncMgmt.sync, &sMeta) == 0) {
+  // if (syncGetSnapshotMeta(pMnode->syncMgmt.sync, &sMeta) == 0) {
+
+  SyncIndex snapshotIndex = sdbGetApplyIndex(pMnode->pSdb);
+  if (syncGetSnapshotMetaByIndex(pMnode->syncMgmt.sync, snapshotIndex, &sMeta) == 0) {
     sdbSetCurConfig(pMnode->pSdb, sMeta.lastConfigIndex);
   }
 

source/dnode/mnode/impl/src/mndTrans.c

@@ -1426,7 +1426,9 @@ void mndTransPullup(SMnode *pMnode) {
   }
 
   SSnapshotMeta sMeta = {0};
-  if (syncGetSnapshotMeta(pMnode->syncMgmt.sync, &sMeta) == 0) {
+  // if (syncGetSnapshotMeta(pMnode->syncMgmt.sync, &sMeta) == 0) {
+  SyncIndex snapshotIndex = sdbGetApplyIndex(pMnode->pSdb);
+  if (syncGetSnapshotMetaByIndex(pMnode->syncMgmt.sync, snapshotIndex, &sMeta) == 0) {
     sdbSetCurConfig(pMnode->pSdb, sMeta.lastConfigIndex);
   }
   sdbWriteFile(pMnode->pSdb);

source/libs/sync/inc/syncRaftCfg.h

@@ -29,6 +29,8 @@ extern "C" {
 
 #define CONFIG_FILE_LEN 1024
 
+#define MAX_CONFIG_INDEX_COUNT 512
+
 typedef struct SRaftCfg {
   SSyncCfg  cfg;
   TdFilePtr pFile;
@@ -36,6 +38,10 @@ typedef struct SRaftCfg {
   int8_t    isStandBy;
   int8_t    snapshotEnable;
   SyncIndex lastConfigIndex;
+
+  SyncIndex configIndexArr[MAX_CONFIG_INDEX_COUNT];
+  int32_t   configIndexCount;
+
 } SRaftCfg;
 
 SRaftCfg *raftCfgOpen(const char *path);

source/libs/sync/src/syncMain.c

@@ -418,6 +418,29 @@ int32_t syncGetSnapshotMeta(int64_t rid, struct SSnapshotMeta* sMeta) {
   return 0;
 }
 
+int32_t syncGetSnapshotMetaByIndex(int64_t rid, SyncIndex snapshotIndex, struct SSnapshotMeta* sMeta) {
+  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  if (pSyncNode == NULL) {
+    return -1;
+  }
+  assert(rid == pSyncNode->rid);
+
+  ASSERT(pSyncNode->pRaftCfg->configIndexCount >= 1);
+  SyncIndex lastIndex = (pSyncNode->pRaftCfg->configIndexArr)[0];
+
+  for (int i = 0; i < pSyncNode->pRaftCfg->configIndexCount; ++i) {
+    if ((pSyncNode->pRaftCfg->configIndexArr)[i] > lastIndex &&
+        (pSyncNode->pRaftCfg->configIndexArr)[i] <= snapshotIndex) {
+      lastIndex = (pSyncNode->pRaftCfg->configIndexArr)[i];
+    }
+  }
+  sMeta->lastConfigIndex = lastIndex;
+  sTrace("sync get snapshot meta by index:%ld lastConfigIndex:%ld", snapshotIndex, sMeta->lastConfigIndex);
+
+  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  return 0;
+}
+
 const char* syncGetMyRoleStr(int64_t rid) {
   const char* s = syncUtilState2String(syncGetMyRole(rid));
   return s;
@@ -2195,8 +2218,8 @@ static int32_t syncNodeConfigChange(SSyncNode* ths, SRpcMsg* pRpcMsg, SSyncRaftE
       char* newStr = syncCfg2Str(&newSyncCfg);
       syncUtilJson2Line(oldStr);
       syncUtilJson2Line(newStr);
-      snprintf(tmpbuf, sizeof(tmpbuf), "config change from %d to %d, %s  -->  %s", oldSyncCfg.replicaNum,
+      snprintf(tmpbuf, sizeof(tmpbuf), "config change from %d to %d, index:%ld, %s  -->  %s", oldSyncCfg.replicaNum,
-               newSyncCfg.replicaNum, oldStr, newStr);
+               newSyncCfg.replicaNum, pEntry->index, oldStr, newStr);
       taosMemoryFree(oldStr);
       taosMemoryFree(newStr);
 
@@ -2212,8 +2235,8 @@ static int32_t syncNodeConfigChange(SSyncNode* ths, SRpcMsg* pRpcMsg, SSyncRaftE
     char* newStr = syncCfg2Str(&newSyncCfg);
     syncUtilJson2Line(oldStr);
     syncUtilJson2Line(newStr);
-    snprintf(tmpbuf, sizeof(tmpbuf), "config change2 from %d to %d, %s  -->  %s", oldSyncCfg.replicaNum,
+    snprintf(tmpbuf, sizeof(tmpbuf), "config change2 from %d to %d, index:%ld, %s  -->  %s", oldSyncCfg.replicaNum,
-             newSyncCfg.replicaNum, oldStr, newStr);
+             newSyncCfg.replicaNum, pEntry->index, oldStr, newStr);
     taosMemoryFree(oldStr);
     taosMemoryFree(newStr);
 
@@ -2295,6 +2318,7 @@ int32_t syncNodeCommit(SSyncNode* ths, SyncIndex beginIndex, SyncIndex endIndex,
         }
 
         // restore finish
+        // if only snapshot, a noop entry will be append, so syncLogLastIndex is always ok
         if (pEntry->index == ths->pLogStore->syncLogLastIndex(ths->pLogStore)) {
           if (ths->restoreFinish == false) {
             if (ths->pFsm->FpRestoreFinishCb != NULL) {

source/libs/sync/src/syncRaftCfg.c

@@ -85,11 +85,6 @@ cJSON *syncCfg2Json(SSyncCfg *pSyncCfg) {
   }
 
   return pRoot;
-  /*
-  cJSON *pJson = cJSON_CreateObject();
-  cJSON_AddItemToObject(pJson, "SSyncCfg", pRoot);
-  return pJson;
-  */
 }
 
 char *syncCfg2Str(SSyncCfg *pSyncCfg) {
@@ -154,6 +149,16 @@ cJSON *raftCfg2Json(SRaftCfg *pRaftCfg) {
   snprintf(buf64, sizeof(buf64), "%ld", pRaftCfg->lastConfigIndex);
   cJSON_AddStringToObject(pRoot, "lastConfigIndex", buf64);
 
+  cJSON_AddNumberToObject(pRoot, "configIndexCount", pRaftCfg->configIndexCount);
+  cJSON *pIndexArr = cJSON_CreateArray();
+  cJSON_AddItemToObject(pRoot, "configIndexArr", pIndexArr);
+  for (int i = 0; i < pRaftCfg->configIndexCount; ++i) {
+    snprintf(buf64, sizeof(buf64), "%ld", (pRaftCfg->configIndexArr)[i]);
+    cJSON *pIndexObj = cJSON_CreateObject();
+    cJSON_AddStringToObject(pIndexObj, "index", buf64);
+    cJSON_AddItemToArray(pIndexArr, pIndexObj);
+  }
+
   cJSON *pJson = cJSON_CreateObject();
   cJSON_AddItemToObject(pJson, "RaftCfg", pRoot);
   return pJson;
@@ -177,6 +182,9 @@ int32_t raftCfgCreateFile(SSyncCfg *pCfg, SRaftCfgMeta meta, const char *path) {
   raftCfg.isStandBy = meta.isStandBy;
   raftCfg.snapshotEnable = meta.snapshotEnable;
   raftCfg.lastConfigIndex = meta.lastConfigIndex;
+  raftCfg.configIndexCount = 1;
+  memset(raftCfg.configIndexArr, 0, sizeof(raftCfg.configIndexArr));
+  raftCfg.configIndexArr[0] = -1;
   char *s = raftCfg2Str(&raftCfg);
 
   char buf[CONFIG_FILE_LEN] = {0};
@@ -207,6 +215,23 @@ int32_t raftCfgFromJson(const cJSON *pRoot, SRaftCfg *pRaftCfg) {
   cJSON *pJsonLastConfigIndex = cJSON_GetObjectItem(pJson, "lastConfigIndex");
   pRaftCfg->lastConfigIndex = atoll(cJSON_GetStringValue(pJsonLastConfigIndex));
 
+  cJSON *pJsonConfigIndexCount = cJSON_GetObjectItem(pJson, "configIndexCount");
+  pRaftCfg->configIndexCount = cJSON_GetNumberValue(pJsonConfigIndexCount);
+
+  cJSON *pIndexArr = cJSON_GetObjectItem(pJson, "configIndexArr");
+  int    arraySize = cJSON_GetArraySize(pIndexArr);
+  assert(arraySize == pRaftCfg->configIndexCount);
+
+  memset(pRaftCfg->configIndexArr, 0, sizeof(pRaftCfg->configIndexArr));
+  for (int i = 0; i < arraySize; ++i) {
+    cJSON *pIndexObj = cJSON_GetArrayItem(pIndexArr, i);
+    assert(pIndexObj != NULL);
+
+    cJSON *pIndex = cJSON_GetObjectItem(pIndexObj, "index");
+    assert(cJSON_IsString(pIndex));
+    (pRaftCfg->configIndexArr)[i] = atoll(pIndex->valuestring);
+  }
+
   cJSON  *pJsonSyncCfg = cJSON_GetObjectItem(pJson, "SSyncCfg");
   int32_t code = syncCfgFromJson(pJsonSyncCfg, &(pRaftCfg->cfg));
   ASSERT(code == 0);

source/libs/sync/src/syncRaftLog.c

@@ -410,7 +410,6 @@ SyncTerm logStoreLastTerm(SSyncLogStore* pLogStore) {
 }
 
 int32_t logStoreUpdateCommitIndex(SSyncLogStore* pLogStore, SyncIndex index) {
-  /*
   SSyncLogStoreData* pData = pLogStore->data;
   SWal*              pWal = pData->pWal;
   // assert(walCommit(pWal, index) == 0);
@@ -420,10 +419,9 @@ int32_t logStoreUpdateCommitIndex(SSyncLogStore* pLogStore, SyncIndex index) {
     const char* errStr = tstrerror(err);
     int32_t     linuxErr = errno;
     const char* linuxErrMsg = strerror(errno);
-      sError("walCommit error, err:%d %X, msg:%s, linuxErr:%d, linuxErrMsg:%s", err, err, errStr, linuxErr,
+    sError("walCommit error, err:%d %X, msg:%s, linuxErr:%d, linuxErrMsg:%s", err, err, errStr, linuxErr, linuxErrMsg);
-    linuxErrMsg); ASSERT(0);
+    ASSERT(0);
   }
-   */
   return 0;
 }
 

source/libs/sync/src/syncSnapshot.c

@@ -671,8 +671,8 @@ int32_t syncNodeOnSnapshotSendCb(SSyncNode *pSyncNode, SyncSnapshotSend *pMsg) {
             char *newStr = syncCfg2Str(&newSyncCfg);
             syncUtilJson2Line(oldStr);
             syncUtilJson2Line(newStr);
-            snprintf(tmpbuf, sizeof(tmpbuf), "config change3 from %d to %d, %s  -->  %s", oldSyncCfg.replicaNum,
+            snprintf(tmpbuf, sizeof(tmpbuf), "config change3 from %d to %d, index:%ld, %s  -->  %s",
-                     newSyncCfg.replicaNum, oldStr, newStr);
+                     oldSyncCfg.replicaNum, newSyncCfg.replicaNum, pMsg->lastConfigIndex, oldStr, newStr);
             taosMemoryFree(oldStr);
             taosMemoryFree(newStr);
 

source/libs/sync/test/syncRaftCfgTest.cpp

@@ -27,6 +27,14 @@ SRaftCfg* createRaftCfg() {
   }
   pCfg->isStandBy = taosGetTimestampSec() % 100;
 
+  pCfg->configIndexCount = 5;
+  for (int i = 0; i < MAX_CONFIG_INDEX_COUNT; ++i) {
+    (pCfg->configIndexArr)[i] = -1;
+  }
+  for (int i = 0; i < pCfg->configIndexCount; ++i) {
+    (pCfg->configIndexArr)[i] = i * 100;
+  }
+
   return pCfg;
 }
 
@@ -100,6 +108,15 @@ void test5() {
   pCfg->isStandBy += 2;
   pCfg->snapshotEnable += 3;
   pCfg->lastConfigIndex += 1000;
+
+  pCfg->configIndexCount = 5;
+  for (int i = 0; i < MAX_CONFIG_INDEX_COUNT; ++i) {
+    (pCfg->configIndexArr)[i] = -1;
+  }
+  for (int i = 0; i < pCfg->configIndexCount; ++i) {
+    (pCfg->configIndexArr)[i] = i * 100;
+  }
+
   raftCfgPersist(pCfg);
 
   printf("%s update json file: %s myIndex->%d \n", (char*)__FUNCTION__, "./test3_raft_cfg.json", pCfg->cfg.myIndex);